Traffic policing - Mixing Bandwidth and Bandwidth Percent

[GM2005]

Hi

I have been asked if the following config will work. It is the output from a QoS calculator. The issue I have is that the bandwidth is specified in Kbps to start then moves on to bandwidth specified in percent. I understand this will not work. Am I correct, and is there a woraround?

Two points.
1. This is a cut down config
2. The class names are purely for example.

policy-map DSCP_CoS_Policy
class Class1_traffic
police 8000 8000 8000 conform-action set-prec-transmit 6 exceed-action set-prec-transmit 6
bandwidth 51
random-detect
random-detect exponential-weighting-constant 3
random-detect precedence 6 20 32 10
random-detect precedence 0 20 32 10
class Class2_traffic
police 408000 38000 76000 conform-action set-dscp-transmit af11 exceed-action set-dscp-transmit af12
bandwidth 1482
random-detect dscp-based
random-detect exponential-weighting-constant 6
random-detect dscp 10 38 61 10
random-detect dscp 12 38 61 10
class Class3_traffic
police 8000 8000 8000 conform-action set-dscp-transmit default exceed-action set-dscp-transmit default
bandwidth percent 10
queue-limit 400
class Class4_traffic
police 8000 8000 8000 conform-action set-dscp-transmit default exceed-action set-dscp-transmit default
bandwidth percent 3
queue-limit 200

Thanks in advance to anyone who takes a look at this.

 

[KiscoKid]

You're right. You cannot specify mixed bandwidth values (i.e. some in percentage and others a fixed value) in the same policy.

The workaround is to specify one or the other consistently throughout your policy. I prefer to use bandwidth % because if you upgrade your WAN pipe in the future, the QoS policy adjusts automatically.

I think all you should have to do is understand how big your pipe is and convert the statements above like "bandwidth 1482" to the equivalent % value.

So for example, if your total WAN bandwidth was 2048Kbps,
"bandwidth 1482" is equivalent to "bandwidth percent 72"

Hope this helps